I have the disk version of wc1, and the deluxe cd edition of wc2 (which includes so 1 and 2, and speech paks). I also have the dos version of wc3.
However, being the minimalist that I am, I bought the Kilrathi Saga and downloaded everything else that I needed. It's just so much easier to run.
Also, I picked up a cd version of WC1 with SM1 and 2, as part of a 10 game package called the Mile-High Club. At the time, I didn't understand why my parents thought that it was going to be pornographic . . . ah, the innocence of youth.